darrylcauldwell.com On a journey around the datacenter and public cloud.

Jira Overview - Terminology Demystified

While I worked with Agile as a software tester when the concept first came out in 2002 shortly afterwards I joined a new company in a new role in Infrastructure, IT operations if you will. My recollection of Agile is that it was not a process at all; rather, it’s a set of principles summarized by the Agile Manifesto.

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How To Calculate Optimal TCP Window Size For Long Distance WAN Link

If you have a requirement to copy large amounts of data along way around the world you may find that despite your link being 60Mb/s if its 5,000 miles away you only can transfer files at much less like 10Mb/s. The cause of this is generally the TCP Window Size is optimized by OS and FTP clients by default to work on networks with less distance and less network round trip latency.

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vSphere Best Practice

I often get asked the question,  what is the best general configuration for private VMware hosting. Typically this is when an engineer or architect has been reading the multiple best practices and has become confused as much best practice advise is conditional. They just want to stand something up quickly with little detail on what the requirements are and then as solution gets used evolve the configuration based on the requirements which come through usage. Its certainly not ideal but does seem to happen a lot.

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Advanced vSphere 5.x Storage - Masking, Multipathing & Filtering

The relationship between a vSphere ESXi host and its shared storage is very important for the solution to work effectively. The storage architecture within vSphere is extensible and this extensibility is known as the Pluggable Storage Architecture often abbreviated to PSA.

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Configuring Project Hanlon On CentOS 6.5

Since the company I work for CSC got a new CEO then CTO its changed direction and the latest change has been to full participate with the Open Source community.  With this news shortly followed an updated version of a tool our new CTO Dan worked on at EMC with Nick Weaver it was formerly called Razor and the new release is Hanlon.

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